. >> now to some incredible video from china. shows a 33 ton shark tank exploding at shanghai shopping mall. people look at the tank when the glass shattered suddenly and huge wave of world trade center comes over the onlookers. 15 people were injured. none critically. 3 lemon shark and dozens of smaller fish all died unfortunately. now shanghai officials say cold temperatures and showedy material made the acrylic sheet so brittle it just gave way. >>> well just ahead tonight. frightening new outlook for computer crime next year. why computer crime next year. why the tablet th if. >> the shift smart phones and tablet causing a shift by hackers for malicious attacks and the bad guys are exploiting some of the newest features to too. david explains what kind of attacks you should expect. >>reporter: collectively virus trojan horses and worm called malwear 55 unique ones relessed over the internet daily, 1 per second. they attack network and p c. constant fear bring down the power grid and mass transit but the new target is the mobi